Everett's wastewater system serves about 165,000 people, conveying sewage through approximately 345 miles of sewer mains, interceptors, laterals, and 31 lift stations to the Everett Water Pollution Control Facility (EWPCF).
In addition to the community of Everett, the EWPCF also treats a portion of the sewage from 3 neighboring sewer systems: Mukilteo Water and Wastewater District, Alderwood Water and Wastewater District, and Silver Lake Water and Sewer District. This system plays a vital role in protecting public health. It also protects rivers, lakes, and streams from pollutants and minimizes harmful impacts to the natural environment.
View or download our booklet, Wastewater Treatment (PDF) and our brochure, How is wastewater treated (PDF) to learn about our wastewater treatment system. These describe our system's preliminary treatment, primary treatment, 2 types of secondary treatment—a pond/lagoon system and a mechanical system, disinfection and where the treated water is discharged.
Our secondary treatment's mechanical system—trickling filters/solids contact (TF/SC) has a total hydraulic treatment capacity of 40.3 MGD, and discharges to a marine deep-water outfall in Port Gardner Bay that is shared with the City of Marysville. The pond system discharges to the Snohomish River.
Learn more about How we clean wastewater at our treatment plant (PDF)
For information about third-party insurance related to utility infrastructure on private property, contact the Washington Office of Insurance Commissioner at 1-800-562-6900.
Please note: The City of Everett is responsible for and maintains sewer lines in the city public right of way. Within the Everett city limits, per city ordinance 14.08.260, private property owners are responsible for the integrity and maintenance of side sewers outside of the city right of way and any materials they discharge into the sewer up to the sewer main.
Contact Jeff Day, Senior Wastewater Treatment Plant Operator, email or 425-257-8225 to schedule a tour and/or receive additional tour information.
View answers to FAQs about biosolids.
View or download the Everett biosolids program strategic planning documents:
Contact Rick Bailey, Biosolids Manager, 425-257-7823 or email if you have additional questions about biosolids.
Contact Chris Merwede, Lab Supervisor, 425-257-8230 or email, from 7:30 a.m. to 4 p.m., Monday through Friday if you have additional questions about Everett's environmental lab.
View or download information about Industrial Pretreatment (PDF)
Fats, Oils & Grease (FOG)
FOG allowed to enter sewer lines are common causes of the overflow of those sewer lines. Buildups increase maintenance costs for both businesses and the city. The best way to control FOG is by removing fats, oils and grease before washing dishes.
View or download our brochure, What's Clogging Your Drains (PDF)
Contact an Industrial Waste Inspector at 425-257-8240 for more information about Industrial Pretreatment.